Question

我想做这样的事情：

CALL testFunction('26e4ccaa-b125-3d9c-c7c1-58175227a48f')
GROUP BY id_c;

这似乎没有用，所以我也尝试了这个：

SELECT *
FROM (
   CALL testFunction('26e4ccaa-b125-3d9c-c7c1-58175227a48f')
) t
GROUP BY t.id_c;

这也不起作用。如果这是或不可能，我找不到任何文件。

我在其他地方使用这个存储过程，创建一个全新的存储过程似乎是多余的，所以我可以包含GROUP BY。我在php应用程序中调用此存储过程。

编辑：

这是存储过程：

BEGIN
    DECLARE lastInsertCount INT;
    DECLARE lastLayer INT;
    DROP TABLE IF EXISTS `temp`;
    DROP TABLE IF EXISTS `productGrid`;

    CREATE TABLE `temp`
    (
        `layer` INT(5),
        `title_c` VARCHAR(255), 
        `name` VARCHAR(255), 
        `rep_first_name` VARCHAR(255), 
        `rep_last_name` VARCHAR(255),
        `id_c` CHAR(36),
        `contact_status_reps_c` VARCHAR(255),
        `phone_mobile` VARCHAR(255),
        `contract_type_c` VARCHAR(255),
        `email_address` VARCHAR(255),
        `active_as_of_c` DATETIME,
        `assigned_user_id` CHAR(36)
    );

    CREATE TABLE `productGrid`
    (
        `percentage_c` INT(5),
        `name` VARCHAR(255), 
        `title_c` VARCHAR(255)
    );

    INSERT INTO `productGrid`(`percentage_c`, `name`, `title_c`)
    SELECT aaigloba_crm.pcg_product_comp_grid_cstm.percentage_c, 
           aaigloba_crm.aos_products.name, 
           aaigloba_crm.pcg_product_comp_grid_cstm.title_c
    FROM aaigloba_crm.aos_products_pcg_product_comp_grid_1_c 
        LEFT OUTER JOIN aaigloba_crm.aos_products ON aaigloba_crm.aos_products_pcg_product_comp_grid_1_c.aos_products_pcg_product_comp_grid_1aos_products_ida = aaigloba_crm.aos_products.id
        LEFT OUTER JOIN aaigloba_crm.pcg_product_comp_grid_cstm ON aaigloba_crm.aos_products_pcg_product_comp_grid_1_c.aos_products_pcg_product_comp_grid_1pcg_product_comp_grid_idb = aaigloba_crm.pcg_product_comp_grid_cstm.id_c
    WHERE aaigloba_crm.aos_products_pcg_product_comp_grid_1_c.deleted = '0';

    INSERT INTO `temp`(`layer`, `title_c`, `name`, `rep_first_name`, `rep_last_name`, `id_c`, `contact_status_reps_c`, `phone_mobile`,`contract_type_c`,`email_address`,`active_as_of_c`,`assigned_user_id`)
    SELECT 0,
    wn_writing_number_cstm.title_c, 
    wn_writing_number.`name`, 
    preps_contracted_reps.first_name, 
    preps_contracted_reps.last_name, 
    wn_writing_number_cstm.id_c, 
    preps_contracted_reps_cstm.contact_status_reps_c, 
    preps_contracted_reps.phone_mobile, 
    preps_contracted_reps_cstm.contract_type_c, 
    email_addresses.email_address,
    STR_TO_DATE(preps_contracted_reps_cstm.active_as_of_c, '%m/%d/%Y'),
    wn_writing_number.assigned_user_id
FROM wn_writing_number LEFT OUTER JOIN wn_writing_number_cac_customize_agent_comp_1_c ON wn_writing_number_cac_customize_agent_comp_1_c.wn_writing946b_number_ida = wn_writing_number.id
     LEFT OUTER JOIN cac_customize_agent_comp ON wn_writing_number_cac_customize_agent_comp_1_c.wn_writing3148nt_comp_idb = cac_customize_agent_comp.id
     LEFT OUTER JOIN cac_customize_agent_comp_cstm ON cac_customize_agent_comp.id = cac_customize_agent_comp_cstm.id_c
     LEFT OUTER JOIN aos_products_cac_customize_agent_comp_1_c ON cac_customize_agent_comp_cstm.id_c = aos_products_cac_customize_agent_comp_1_c.aos_produca2b8nt_comp_idb
     LEFT OUTER JOIN preps_contracted_reps_wn_writing_number_1_c ON preps_contracted_reps_wn_writing_number_1_c.preps_contracted_reps_wn_writing_number_1wn_writing_number_idb = wn_writing_number.id
     LEFT OUTER JOIN preps_contracted_reps ON preps_contracted_reps_wn_writing_number_1_c.preps_cont9effed_reps_ida = preps_contracted_reps.id
     LEFT OUTER JOIN preps_contracted_reps_cstm ON preps_contracted_reps.id = preps_contracted_reps_cstm.id_c
     LEFT OUTER JOIN email_addr_bean_rel ON email_addr_bean_rel.bean_id = preps_contracted_reps_cstm.id_c
     LEFT OUTER JOIN email_addresses ON email_addr_bean_rel.email_address_id = email_addresses.id
     LEFT OUTER JOIN wn_writing_number_cstm ON wn_writing_number_cstm.id_c = wn_writing_number.id
    WHERE wn_writing_number_cstm.wn_writing_number_id_c = passId AND wn_writing_number.deleted = '0' AND preps_contracted_reps.deleted = '0' AND wn_writing_number.deleted = '0' AND email_addr_bean_rel.deleted = '0'
    GROUP BY wn_writing_number.`name`;

    SET lastLayer := 0;
    SET lastInsertCount := 1;
    LayerLoop: WHILE lastInsertCount > 0 DO
      INSERT INTO `temp`(`layer`, `title_c`, `name`, `rep_first_name`, `rep_last_name`, `id_c`, `contact_status_reps_c`, `phone_mobile`,`contract_type_c`,`email_address`,`active_as_of_c`,`assigned_user_id`)
      SELECT lastLayer + 1,
        wn_writing_number_cstm.title_c, 
        wn_writing_number.`name`, 
        preps_contracted_reps.first_name, 
        preps_contracted_reps.last_name, 
        wn_writing_number_cstm.id_c,
        preps_contracted_reps_cstm.contact_status_reps_c, 
        preps_contracted_reps.phone_mobile, 
        preps_contracted_reps_cstm.contract_type_c, 
        email_addresses.email_address,
        STR_TO_DATE(preps_contracted_reps_cstm.active_as_of_c, '%m/%d/%Y'),
        wn_writing_number.assigned_user_id
    FROM wn_writing_number LEFT OUTER JOIN wn_writing_number_cac_customize_agent_comp_1_c ON wn_writing_number_cac_customize_agent_comp_1_c.wn_writing946b_number_ida = wn_writing_number.id
         LEFT OUTER JOIN cac_customize_agent_comp ON wn_writing_number_cac_customize_agent_comp_1_c.wn_writing3148nt_comp_idb = cac_customize_agent_comp.id
         LEFT OUTER JOIN cac_customize_agent_comp_cstm ON cac_customize_agent_comp.id = cac_customize_agent_comp_cstm.id_c
         LEFT OUTER JOIN aos_products_cac_customize_agent_comp_1_c ON cac_customize_agent_comp_cstm.id_c = aos_products_cac_customize_agent_comp_1_c.aos_produca2b8nt_comp_idb
         LEFT OUTER JOIN preps_contracted_reps_wn_writing_number_1_c ON preps_contracted_reps_wn_writing_number_1_c.preps_contracted_reps_wn_writing_number_1wn_writing_number_idb = wn_writing_number.id
         LEFT OUTER JOIN preps_contracted_reps ON preps_contracted_reps_wn_writing_number_1_c.preps_cont9effed_reps_ida = preps_contracted_reps.id
         LEFT OUTER JOIN preps_contracted_reps_cstm ON preps_contracted_reps.id = preps_contracted_reps_cstm.id_c
         LEFT OUTER JOIN email_addr_bean_rel ON email_addr_bean_rel.bean_id = preps_contracted_reps_cstm.id_c
         LEFT OUTER JOIN email_addresses ON email_addr_bean_rel.email_address_id = email_addresses.id
         LEFT OUTER JOIN wn_writing_number_cstm ON wn_writing_number_cstm.id_c = wn_writing_number.id
      WHERE preps_contracted_reps.deleted = '0' AND wn_writing_number.deleted = '0' AND email_addr_bean_rel.deleted = '0' AND wn_writing_number_cstm.wn_writing_number_id_c IN (SELECT id_c FROM `temp` WHERE layer = lastLayer)
      GROUP BY wn_writing_number.`name`;

      SET lastInsertCount := ROW_COUNT();
      SET lastLayer := lastLayer + 1;
    END WHILE LayerLoop;

    SELECT `title_c`, `name`, `rep_first_name`, `rep_last_name`, `id_c`, `contact_status_reps_c`, `phone_mobile`,`contract_type_c`,`email_address`,`active_as_of_c`,`assigned_user_id`
    FROM `temp`
    ORDER BY rep_first_name ASC;
END

Answer 1

GROUP子句是一个SQL子句，需要合并到一个完整的SQL表达式中，因为SQL解析器以原子方式优化和执行整个表达式。该函数返回一个表，而不是SQL表达式，并且SQL子句不能修改表。

使用临时表是概念上分解操作的另一个标志，可能是不优化它。分解对于过程代码来说是一个很好的模式，但它是声明性代码的反模式。

您可能已经知道WHILE循环在对关系数据的操作中存在问题。太糟糕了，你没有使用isam表。

Answer 2

您的函数需要返回一组记录。

CREATE OR REPLACE FUNCTION testFunction(field1 OUT text, field2 OUT INT)
RETURNS setof record
AS $$ SELECT field1, field2 FROM yourTable $$
LANGUAGE sql;

然后你可以调用你的函数

SELECT field1, SUM(field2)
FROM testFunction()
GROUP BY field1

选中 DEMO

CREATE OR REPLACE FUNCTION dup1(int) 
RETURNS TABLE( f1 text, f2 int) AS 
$$ 
   select f1::text, f2
   FROM ( VALUES ('apple', 3), ('apple', 2), 
                 ('mango', 1), ('pineapple', 3), 
                 ('pineapple', 5) ) T(f1, f2)
$$
LANGUAGE sql;

SELECT f1, SUM(f2)
FROM dup1(1)
GROUP BY f1;

<强>输出

在MySQL中调用存储过程后使用GROUP BY

2 个答案: